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Add UnwrapForward and UnwrapBackwards to SeqNumUnwrapper.

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Bug: webrtc:12979
Change-Id: I4c3b3f5e1ff70ae528cfd73a34baafc75cccf481
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226462
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34505}
This commit is contained in:
philipel
2021-07-19 15:40:17 +02:00
committed by WebRTC LUCI CQ
parent 99a71f49c0
commit 8ab87e41a1
2 changed files with 50 additions and 0 deletions
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22
rtc_base/numerics/sequence_number_util.h
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@ -109,6 +109,28 @@ class SeqNumUnwrapper {
return last_unwrapped_;
}
int64_t UnwrapForward(T value) {
if (!last_value_) {
last_unwrapped_ = {value};
} else {
last_unwrapped_ += ForwardDiff<T, M>(*last_value_, value);
}
last_value_ = value;
return last_unwrapped_;
}
int64_t UnwrapBackwards(T value) {
if (!last_value_) {
last_unwrapped_ = {value};
} else {
last_unwrapped_ -= ReverseDiff<T, M>(*last_value_, value);
}
last_value_ = value;
return last_unwrapped_;
}
private:
int64_t last_unwrapped_ = 0;
absl::optional<T> last_value_;